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� � R � � { � � ~ " � � � � ( � U / ! � � � � � ~ _ D � � /// IoError(err) => {}, // IO error occurred /// Data(data) => {}, // process data /// Connected => {}, // new client /// match result { /// use ScanResult::*; /// lobby.scan(|id, result| { /// ``` /// /// # Example /// /// Scan the clients' message queues for data. } failed } } failed.push((id, e)); if let Err(e) = conn.write_all(data) { for (id, &mut (_, ref mut conn)) in self.connections.lock().unwrap().iter_mut().filter(|&(id, _)| predicate(id)) { let mut failed = Vec::new(); fn message<P>(&mut self, predicate: P, data: &[u8]) -> Vec<(usize, io::Error)> let (new_s, new_r) = channel(); let names = Arc::new(Mutex::new(VecMap::new())); let connections = Arc::new(Mutex::new(VecMap::new())); let listener = try!(TcpListener::bind(&addr)); pub fn new<A>(addr: A) -> io::Result<Lobby> where A: ToSocketAddrs { /// method. /// Any additional data sent by the client will need to be processed via the `scan()` /// /// Note that this is not necessarily a unique identifier. /// its termination, which will serve as the name associated with this connection. /// client should send is a UTF-8 encoded string followed by a 0 byte to indicate /// plus an additional thread for each connection. The first thing any new /// Creating a Lobby will spawn a new thread listening for incoming connections, /// /// Create a new Lobby server at the specified address. impl Lobby { } thread: JoinHandle, new_r: Receiver<usize>, names: Arc<Mutex<VecMap<String>>>, connections: Arc<Mutex<VecMap<ClientConn>>>, listener: TcpListener, pub struct Lobby { /// A Lobby server instance. type ClientConn = (Receiver<io::Result<Vec<u8>>>, TcpStream); use std::sync::mpsc::{channel, Receiver, TryRecvError}; use std::sync::{Arc, Mutex}; use std::thread::{self, JoinHandle}; use std::net::{TcpListener, TcpStream, ToSocketAddrs}; use std::io::{self, BufRead, Write, BufReader}; use std::collections::{VecDeque, VecMap}; #![allow(dead_code)] #![feature(collections, io, net)] //! data sent will be queued up to be scanned by the server. //! name followed by a 0 byte to indicate its termination. After that, all further //! thing a client should do after establishing the connection is send a UTF-8 encoded //! Clients can then connect to the server using `TcpStream::connect()`. The first //! //! ``` //! } //! }); //! } //! ScanResult::Disconnected => println!("{} has disconnected.", name), //! ScanResult::IoError(err) => println!("{} ran into an IO error: {}", name, err), //! ScanResult::Data(data) => println!("{} sent {} bytes of data.", name, data.len()), //! ScanResult::Connected => println!("{} has connected.", name), //! match result { //! let name = server.name(id).unwrap(); //! server.scan(|id, result| { //! loop { //! //! let server = Lobby::new("127.0.0.1:8080").unwrap(); //! //! use lobby::{Lobby, ScanResult}; //! extern crate lobby; //! ``` //! //! Here's how you spin up a `lobby` server and poll the clients for data: //! //! as clients disconnect from the server. //! Each client is represented using a unique integer id, and id's are recycled //! //! for messaging them and polling them for data. //! which automatically keeps track of connected clients and provides facilities //! The `lobby` crate is designed to provide a convenient way to spin up a server //! //! TCP server implementation suitable for chat rooms and games. ad g ; 0 � � � B � o \ 0 " �
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� � � � � r O = ; / # � � } Disconnected, Connected, IoError(io::Error), Dat}} Disconnected, /// A client has disconnected. Connected, } Disconne} Discon} Discon} Disconnected, /// A client has disconnected. Connected, /// A new client has connected. IoError(io::Error), /// An IO error occurred while scanning. Data(Vec<u8>), /// The client sent data. pub enum ScanResult { /// The result of a client scan. } } self.names.lock().unwrap().get(&client).map(|s| s.clone()) pub fn name(&self, client: usize) -> Option<String> { /// Get the registered name for a given client. } } callback(id, result); } self.connections.lock().unwrap().remove(&id); if let ScanResult::Disconnected = result { for (id, result) in results.into_iter() { } } Err(TryRecvError::Disconnected) => results.push((id, ScanResult::Disconnected)), Err(TryRecvError::Empty) => {}, // do nothing Ok(Err(err)) => results.push((id, ScanResult::IoError(err))), Ok(Ok(data)) => results.push((id, ScanResult::Data(data))), match dr.try_recv() { for (id, &mut (ref mut dr, _)) in self.connections.lock().unwrap().iter_mut() { let mut results = Vec::with_capacity(self.connections.lock().unwrap().len()); } } Err(_) => unimplemented!(), }, panic!("tried to check for new clients on disconnected channel!"); Err(e) if e == TryRecvError::Disconnected => { Err(e) if e == TryRecvError::Empty => break, Ok(id) => callback(id, ScanResult::Connected), match self.new_r.try_recv() { loop { pub fn scan<F: Fn(usize, ScanResult) -> ()>(&self, callback: F) { ad e & � � � { T S / � � j 1 �
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� � ` 4 � � l 9 / � � � � � � z f J ? 9 8 � � � � a � � � { � k 8 � � � � � � � � � a B ' � � � /// IoError(err) => {}, // IO error occurred /// Data(data) => {}, // process data /// Connected => {}, // new client /// match result { /// use ScanResult::*; /// lobby.scan(|id, result| { /// ``` /// /// # Example /// /// Scan the clients' message queues for data. } failed } } failed.push((id, e)); if let Err(e) = conn.write_all(data) { for (id, &mut (_, ref mut conn)) in self.connections.lock().unwrap().iter_mut().filter(|&(id, _)| predicate(id)) { let mut failed = Vec::new(); fn message<P>(&mut self, predicate: P, data: &[u8]) -> Vec<(usize, io::Error)> where P: Fn(usize) -> bool { /// Send a message to every connected client for which `predicate` returns true. } self.message(|id| id != client, data) pub fn message_rest(&mut self, client: usize, data: &[u8]) -> Vec<(usize, io::Error)> { /// Send a message to every client but one. } self.message(|_| true, data) pub fn broadcast(&mut self, data: &[u8]) -> Vec<(usize, io::Error)> { /// Send a message to all connected clients. } }) thread: thread, nr: nr, names: names, connections: connections, listener: listener, Ok(Lobby{ }; }) } } connections.lock().unwrap().insert(new_id, (dr, conn)); }); } } } break; }, }, }, }, }, return; free_ids.lock().unwrap().push_back(my_id); drop(ds); Err(_) => { }, new_s.send(new_id).unwrap(); names.lock().unwrap().insert(my_id, String::from_utf8(name_buf).unwrap()); name_buf.pop(); // remove the delimiting 0 Ok(_) => { match reader.read_until(0, &mut name_buf) { let my_id = new_id; let mut name_buf = Vec::new(); let mut reader = BufReader::new(conn_reader); thread::spawn(move || { let names = names.clone(); let new_s = new_s.clone(); let (ds, dr) = channel(); let conn_reader = conn.try_clone().unwrap(); }; None => { id += 1; id }, Some(id) => id, let new_id = match free_ids.lock().unwrap().pop_front() { let free_ids = free_ids.clone(); if let Ok(conn) = conn { for conn in listener.incoming() { let free_ids = Arc::new(Mutex::new(VecDeque::new())); let mut id = 0; thread::spawn(move || { let names = names.clone(); let connections = connections.clone(); let listener = listener.try_clone().unwrap(); let thread = { ad 6 � O � � � w + � n K J
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� � � � � � 6 � � � � * " � � R $ � � b H � � 8 � � � � � � ~ v � � /// in their main loop in order to continuously process data. /// this method does not block. Most applications will want to wrap this call up /// Note that the callback is only invoked if there is something to report, and that /// /// Scan the clients' message queues for data. } failed } } failed.push((id, e)); if let Err(e) = conn.write_all(data) { for (id, &mut (_, ref mut conn)) in self.connections.lock().unwrap().iter_mut().filter(|&(id, _)| predicate(id)) { let mut failed = Vec::new(); pub fn message<P>(&self, predicate: P, data: &[u8]) -> Vec<(usize, io::Error)> where P: Fn(usize) -> bool { /// the error itself. /// Returns a list of tuples pairing the id of each client that ran into an IO error with /// /// Send a message to every connected client for which `predicate` returns true. } self.message(|id| id != client, data) pub fn message_rest(&self, client: usize, data: &[u8]) -> Vec<(usize, io::Error)> { /// the error itself. /// Returns a list of tuples pairing the id of each client that ran into an IO error with /// /// Send a message to every client but one. Useful for, e.g., one client messaging the others. } self.message(|id| id == client, data) pub fn message_client(&self, client: usize, data: &[u8]) -> Vec<(usize, io::Error)> { /// the error itself. /// Returns a list of tuples pairing the id of each client that ran into an IO error with /// /// Send a message to a single client. } self.message(|_| true, data) pub fn message_all(&self, data: &[u8]) -> Vec<(usize, io::Error)> { /// the error itself. /// Returns a list of tuples pairing the id of each client that ran into an IO error with /// /// Send a message to all connected clients. } }) thread: thread, new_r: new_r, names: names, connections: connections, listener: listener, Ok(Lobby{ }; }) } } connections.lock().unwrap().insert(new_id, (dr, conn)); }); } } } break; free_ids.lock().unwrap().push_back(my_id); drop(ds); } else { reader.consume(read); if read > 0 { if let Some(read) = result { }; Err(e) => { ds.send(Err(e)).unwrap(); None }, Ok(data) => { ds.send(Ok(data.to_vec())).unwrap(); Some(data.len()) }, Ok(data) if data.len() == 0 => Some(0), let result = match reader.fill_buf() { loop { }